Theropod size guide
Largest Carnivorous Dinosaurs
Spinosaurus is the longest in this set, Giganotosaurus is a close length rival, and the largest T. rex specimens pack more mass into a shorter body.
- Size profiles
- 3
- Direct comparisons
- 3
- Measurement
- Length + mass
All bars share one linear metre scale. Human height and animal body length use different orientations, noted on each detail page.
How to read this guide
Same ruler, different evidence
The guide avoids declaring one universal winner. It separates nose-to-tail length, representative mass and fossil completeness, then links the direct matchups.
Subject profiles
Measure each giant
Open a profile for the human comparison, 3D view, uncertainty note and source list behind each representative size.
Direct matchups
Compare the closest questions
Each matchup has a separate verdict and explanation instead of substituting names into one generic template.
Spinosaurus · T. rex
Spinosaurus vs. T. rex: which was bigger?
Spinosaurus is 1.5 m longer; T. rex is about 1 tonne heavier.
Open comparison ↗T. rex · Giganotosaurus
T. rex vs. Giganotosaurus: length versus build
Giganotosaurus is 0.5 m longer; T. rex is about 1.2 tonnes heavier.
Open comparison ↗Spinosaurus · Giganotosaurus
Spinosaurus vs. Giganotosaurus: two 100-million-year-old giants
Spinosaurus is 1 m longer; displayed masses differ by only 0.2 tonnes.
Open comparison ↗Evidence